Apollo 12 "Guidance and Navigation Summary" manual by Delco Electronics, used by MIT engineer George Silver, 5.5 x 8.5, annotated on the textblock edges, "G. L. Silver, MIT/IL" and "Geo. L. Silver, MIT/IL," with the fore-edge marked with the contents of the various sections. The front cover also bears a typed "George Silver" label, annotated, "Do not borrow without 'asking,'" and the spine has a similar label, annotated, "Apollo 12 'Info.'" The manual has sections on "CM Software," "LM Software," "ASPO 45 CRT Displays," "Launch and Burn Schedule," "Burn Perturbations," and "Hardware," and contains numerous diagrams, instructions, lists, and code definitions related to the guidance and navigation systems used on the Apollo 12 lunar landing mission. Two pages boast annotations made during the mission, pertaining to the TLI. In fine condition, with light wear from use. From the Don Eyles Apollo Computer Collection.
